[3] Discourse delivered at the Royal Institution of Great Britain, Friday, April 24, 1896.

[4] Essays on Rural Hygiene, 2nd ed. 1894. Longmans.

[5] Delivered before the Nottingham Medico-Chirurgical Society on Oct. 30, 1895.

[6] Parkes' Hygiene, 8th edition, p. 10.

[7] Bacteria and their Products, p. 394. Walter Scott, 1891.

[8] Vol. i., p. 249.

[9] Essays on Rural Hygiene, 2nd edition. Longmans, 1894.